Has any player beat both of the Williams sisters in singles games within a week?

Question

Victoria Azaranka beat Serena Williams 2-1 on September 10th, 2020 at the US Open semis. She went on to beat Venus Williams 2-0 on September 16th, 2020 at the Italian Open.

The timing worked nicely for Azaranka to beat the Williams sisters within a week in 2 tournaments as she beat Serena in the second last match of the women's singles of US Open, and faced Venus on the first round of the next WTA tournament, the Italian Open. Otherwise this feat might have been easier done in just one tournament.

Given the dominant run the Williams sisters have had in the past 20+ years, I wonder had thy been beat in a week by the same player ever before in single's tournaments?

Answer 1

2001 Australian Open

Martina Hingis defeated Serena in QF 6-2 3-6 8-6 and Venus in SF 6-1 6-1
Martina lost the final though to Jennifer Capriati.

2007 US Open

Justine Henin defeated Serena in QF 7-6 6-1 and Venus in SF 7-6 6-4
Justine won the final against Svetlana Kuznetsova

2009 US Open

Kim Clijsters defeated Venus in 4R 6-0 0-6 6-4 and Serena in SF 6-4 7-5
Kim won the final against Caroline Wozniacki

2016 US Open

Karolína Plíšková defeated Venus in 4R 4-6 6-4 7-6 and Serena in SF 6-2 7-6
Karolína lost the final though to Angelique Kerber